So, I can enter tags I really, really like as my favorite tags. But how do I get images to appear in this section of my profile? If I remember correctly, I have once seen images there on some profile, but for most, it doesn't seem to work, too.

For fav tags:
My account> Settings> just bellow the email field.
Edit: disregard this, posting at 3 in the morning, mind is cloudy.

Only works for contributors and privileged members I suppose